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U.S. Geological Survey
Open-File Report 2006-1041
Version 1.0

Chemical Analyses and K-Ar Ages of Samples from 13 Drill Holes, Medicine Lake Volcano, California

By Julie M. Donnelly-Nolan


thumbnail of index map showing the study area south of Lava Beds National Monument

This report presents chemical analyses and K-Ar ages obtained from drill hole samples studied in support of geologic mapping at Medicine Lake volcano (MLV), northern California. The holes were drilled by private companies exploring for geothermal energy at the volcano. Drill core and cuttings were later made available for study; core is stored at the Energy and Geoscience Institute (EGI) warehouse in Salt Lake City, Utah. Discussion of the significance of the chemical and age data will be presented elsewhere, although it is apparent from the cross-section and from Table 1 that a large percentage of MLV core consists of rocks with more than 63 percent SiO2.

Download this report as a 20-page PDF document (of2006-1041.pdf; 736 KB)

For questions about the content of this report, contact Julie Donnelly-Nolan

Also of interest:

Open-File Report 2005-1416, Argon dating at and near Medicine Lake volcano, California: Results and data, by Julie M. Donnelly-Nolan and Marvin A. Lanphere

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Maintained by: Michael Diggles
Date created: August 8, 2006 (mfd)